Biological leaching process for separating out metal ions from waste battery directly

A waste battery, biological leaching technology, applied in the direction of improving process efficiency, can solve the problems of high processing cost, large investment, large acid consumption, etc., and achieve high metal dissolution rate, good application prospect and low processing cost. Effect

Inactive Publication Date: 2007-08-22
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

Pyrometallurgical technology is complicated, large investment, high energy consumption, and extremely serious secondary pollution; although wet treatment has relatively simple equipment requirements, relatively mild op

Method used

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  • Biological leaching process for separating out metal ions from waste battery directly

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Experimental program
Comparison scheme
Effect test

Example Embodiment

[0031] Example 1.

[0032] Taking chemical leaching and biological leaching to compare the leaching efficiency of metals from three types of used batteries (nickel-cadmium batteries, zinc-manganese batteries, and lithium-ion batteries) as an example, the specific operations are as follows:

[0033] 1) After disassembling the waste battery and removing the single components such as copper cap, aluminum foil, zinc foil, film, carbon rod, etc., collect the battery positive and negative electrode materials with complex composition and the most concentrated metal content, carefully crush them into powder and pass through a 20-mesh sieve And bottling for later use;

[0034] 2) Prepare, inoculate, and shake up several bottles of 100mL culture solution according to the conditions of acid-producing culture solution. When the pH drops to 2.0, add 1.0g of the stripped electrode mixed material, and put it in the shaker for biological leaching. Add the specified battery at the initial pH value...

Example Embodiment

[0037] Example 2.

[0038] Take the use of biological leaching technology to treat waste zinc-manganese batteries as an example, the specific operations are as follows:

[0039] 1) Same as Example 1(1);

[0040] 2) Prepare, inoculate, and culture several bottles of 100mL culture solution on a shaker according to the conditions of the acid-producing culture solution (the concentration of sulfur powder is 2.0g / L, 3.0g / L, 4.0g / L respectively), at the designed initial pH value (2.0, 3.0, 4.0), add the specified batteries (0.5g, 1.0g, 1.5g), and then incubate at a certain temperature (27°C, 35°C, 42°C);

[0041] 3) Regularly take samples and measure the pH change of the solution and the change of metal ion concentration in the solution;

[0042] 4) The experimental results show: when the pH value is 2.0, the sulfur powder concentration is 4.0g / L, and the battery dosage is 1.0g, the dissolved zinc and manganese ions in the waste zinc-manganese battery are 500mg / L and 800mg / L, respective...

Example Embodiment

[0043] Example 3.

[0044] Take the use of biological leaching technology to process waste nickel-hydrogen batteries as an example, the specific operations are as follows:

[0045] 1)-3) Same as Example 2(3);

[0046] 4) The results show that when the pH value is 2.0, the sulfur powder concentration is 4.0g / L, and the battery dosage is 1.0g, the nickel dissolution concentration in the cathode material of the waste nickel-hydrogen battery is 1938mg / L, respectively. At pH 1.0, the eluted concentration of nickel in the positive electrode material is 4976 mg / L, and the eluted concentration of cobalt is 240 mg / L.

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Abstract

The present invention is biological leaching process for separating out metal ions from waste battery directly, and the green process may be used in supplementing or replacing high temperature chemical leaching with strong acid. The present invention has direct waste battery leaching process with simultaneous acid generating and leaching, and is suitable for all kinds of waste battery. The process of the present invention has lower acid consumption, low cost, high metal leaching rate, mild operation and other advantages, and possesses excellent application foreground.

Description

Technical field [0001] The invention relates to a method for green treatment of waste batteries by using biological leaching technology to directly dissolve metals in waste batteries, which is used in the field of waste battery treatment. Background technique [0002] The pollution of waste batteries has attracted more and more attention at home and abroad. Discarded batteries containing a large amount of metal ions not only pose a huge threat to soil, water and human health, but also cause a huge waste of resources. The current recycling technology of waste batteries has attracted great attention from all over the world and has become a research hotspot. The traditional treatment methods for waste batteries include pyrometallurgy and hydrometallurgy. Pyrometallurgical technology is complicated, large investment, high energy consumption, and extremely serious secondary pollution; although wet treatment has relatively simple equipment requirements, relatively mild operating ...

Claims

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Application Information

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IPC IPC(8): C22B3/18C22B7/00C22B26/12C22B23/00C22B19/00C22B47/00
CPCY02P10/20
Inventor 吴锋辛宝平朱庆荣孙艳李丽
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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